In 1936, the British writer Rebecca West stood on the balcony of Sarajevo’s town hall and said to her husband, “I shall never be able to understand how it happened.” It was World War I: the civilizational cataclysm that began, according to conventional chronology, when Archduke Franz Ferdinand, heir to the throne of Austria-Hungary, was assassinated in the Bosnian capital on June 28, 1914, by Gavrilo Princip, a twenty-year-old Bosnian Serb.
World War I was known for decades as the “Great War.” It seems an apt title. For if we think of a century not as an aggregation of one hundred years but as an epoch, what we know as “the twentieth century” began with the guns of August 1914 and ended when one of the Great War’s more consequential by-products, the Soviet Union, disintegrated in August 1991. World War I set in motion virtually all the dynamics that were responsible for shaping world history and culture in those seventy-seven years: the collapse of dynastic power in the fall of the German, Austro-Hungarian, Russian, and Ottoman empires; the end of the Caliphate; new nation-states, new tensions in colonial competition, and new passions for decolonization; the mid-twentieth-century totalitarianisms; efforts to achieve global governance; the next two world wars (World War II and the Cold War); the emergence of the United States as leader of the West; serious alterations in the basic structures of domestic and international finance; and throughout Western culture, a vast jettisoning of traditional restraints in virtually every field, from personal and social behavior to women’s roles to the arts.